1 files changed, 8 insertions, 2 deletions

diff --git a/drivers/tty/tty_buffer.c b/drivers/tty/tty_buffer.c
index 143deb62467d..3605103fc1ac 100644
--- a/drivers/tty/tty_buffer.c
+++ b/drivers/tty/tty_buffer.c
@@ -202,14 +202,16 @@ static void tty_buffer_free(struct tty_port *port, struct tty_buffer *b)
 /**
  *      tty_buffer_flush                -       flush full tty buffers
  *      @tty: tty to flush
+ *      @ld:  optional ldisc ptr (must be referenced)
  *
- *      flush all the buffers containing receive data.
+ *      flush all the buffers containing receive data. If ld != NULL,
+ *      flush the ldisc input buffer.
  *
  *      Locking: takes buffer lock to ensure single-threaded flip buffer
  *               'consumer'
  */
 
-void tty_buffer_flush(struct tty_struct *tty)
+void tty_buffer_flush(struct tty_struct *tty, struct tty_ldisc *ld)
 {
         struct tty_port *port = tty->port;
         struct tty_bufhead *buf = &port->buf;
@@ -223,6 +225,10 @@ void tty_buffer_flush(struct tty_struct *tty)
                 buf->head = next;
         }
         buf->head->read = buf->head->commit;
+
+        if (ld && ld->ops->flush_buffer)
+                ld->ops->flush_buffer(tty);
+
         atomic_dec(&buf->priority);
         mutex_unlock(&buf->lock);
 }